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Ch. 2.2 - Nutrition and Energy Flow
Ch. 2.2 - Nutrition and Energy Flow
11
Biology
10th Grade
11/21/2011

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Term
autotroph
Definition
Organisms that can use energy from the sun or energy stored in chemical compounds to produce their own nutrients; organisms that can use the sun to make their own food.
Term
heterotroph
Definition
Organisms that cannot make their own food and must feed on other organisms.
Term
scavenger
Definition
organisms that do not kill for food, but rather eat animals that have already died.
Term
decomposers
Definition
organisms, such as fungi, that break down and absorb nutrients from dead organisms.
Term
food chain
Definition
a simple model that scientists use to show how matter and energy move through an ecosystem.
Term
trophic level
Definition
organism in a food chain that represents a feeding step in the passsage of energy and materials.
Term
food web
Definition
a more realistic and complex model that expresses all the possible feeding relationships at each trophic level in a community.
Term
herbivore
Definition
these organisms only eat grass or other plant life
Term
carnivore
Definition
these organisms only kill and eat meat and other animals
Term
omnivore
Definition
these organisms will eat both plants and animals
Term
water cycle
Definition
precipitation, condensation, transpiration, evaporation
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